[Freeciv-Dev] (PR#7499) problems with detachable panes

["Vasco Alexandre da Silva Costa" <vasc@xxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=7499 >

> [jdorje - Tue Feb 24 00:48:41 2004]:
> 
> Vasco Alexandre da Silva Costa wrote:
> > <URL: http://rt.freeciv.org/Ticket/Display.html?id=7499 >
> > 
> > 
> > On Mon, 23 Feb 2004, Jason Short wrote:
> > 
> > 
> >><URL: http://rt.freeciv.org/Ticket/Display.html?id=7499 >
> >>
> >>When I detach one of the detachable panes I get a gdk warning like:
> >>
> >>(civclient:13948): Gdk-CRITICAL **: file gdkdraw.c: line 370
> >>(gdk_draw_line): assertion `GDK_IS_DRAWABLE (drawable)' failed
> >>
> >>and if I'm unlucky freeciv will crash.
> >>
> >>jason
> > 
> > 
> > GTK+ 1.2 or 2.0?
> 
> gtk2 client.
> 
> jason

I think I know why the bug happens. The code used to draw directly to
'overview_canvas->window'. Now you copy the pointer to a struct, and use
that pointer. But what if the pointer value in the original
'overview_canvas' was changed uh? Yep. Boom!

I'm working on a fix.